The system I designed is intended to automatically fill a 60-litre container with rainwater in order to constantly irrigate a specific area of the garden. As soon as a sensor - consisting of an ultrasonic sensor and a mechanical float switch - recognises that the container is full, a motor-driven flap automatically closes the gutter. A moisture sensor in the respective beds or flower pots measures the soil moisture content and controls the watering accordingly. If irrigation is required, the water is channelled from the container to the plants via a submersible pump using a drip irrigation system. The pump is powered by a photovoltaic module that generates electricity and stores it in a 12V battery. The system is controlled via buttons and a touch display. The display shows the fill level of the water tank and the soil moisture in real time.